- 1. A displaying, revealing, exhibiting, or making accessible. 2. In dentistry, loss of hard tooth structure covering the dental pulp due to caries, dental instrumentation, or trauma. 3. Proximity and/or contact with a source of a disease agent in such a manner that effective transmission of the agent or harmful effects of the agent may occur. 4. The amount of a factor to which a group or individual was exposed, in contrast to the dose, the amount that enters or interacts with the organism.
* * *ex·po·sure ik-'spō-zhər n1) the fact or condition of being exposed: asa) the condition of being unprotected esp. from severe weather <the hiker died of \exposure after becoming lost in the snowstorm>b) the condition of being subject to some detrimental effect or harmful condition <repeated \exposure to bronchial irritants> <risk \exposure to the flu> <benign skin discolorations caused by sun \exposure (Katie Tyndall)>
* * *n.(in behaviour therapy) a method of treating fears and phobias that involves confronting the individual with the situation he has been avoiding, so allowing the fears to wane by habituation. It can be achieved gradually by desensitization or graded self-exposure or suddenly by flooding.
* * *ex·po·sure (ek-spoґzhər) [L. exponere to put out] 1. the act of laying open, as surgical exposure. 2. the condition of being subjected to something that could have a harmful effect., such as an infectious agent or extremes of weather or radiation. 3. in radiology, a measure of the x-ray or gamma radiation at a certain place based on its ability to cause ionization. The unit of exposure is the roentgen. Symbol X. Called also exposure dose. 4. in radiology, the product of the intensity of x-rays and the time the film is exposed.
Medical dictionary. 2011.